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P0401 Diagnostic Trouble Code Discussion for April 2005

Insufficient EGR Flow Detected

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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2000 Pontiac Montana 3.4L MIL Lamp on VIN: 1GMDXU3E2Y
P0401: Insufficient EGR Flow Detected. hey techs please help don't know any thing to do to remedy but has to be fixed for state inspection any suggestions.
April 08, 2005
1997 Toyota Camry CE 2.2L MIL Lamp on VIN: JT2BG22K3V
P0401: EGR System Insufficient Flow Detected. ... have this egr code- p0401-low flow---ive traced all the vacuum lines in the system-they all are connected correctly -you can make the car stumble if you aplly vacuum to the egr-weve installed a new vacuum modulator and vsv valve on back of block-im not sur...
April 08, 2005
2000 Ford Windstar LX 3.8L MIL Lamp on VIN: 2FMZA5140Y
P0401: INSUFFICIENT EGR FLOW DETECTEDmemory code. this should be a pretty simple question. i have 5 volts on the DPFE sense circit all the time, i suspect something shorted together in the harness, but scan data and testing voltage at the sensor conector was as far as i got when i was out of time to check thi...
April 13, 2005
1997 Toyota Camry CE 2.2L MIL Lamp on
P0401: EGR System Insufficient Flow Detected. I have a problem with this 97 camry, the po401 will come back while on the 2nd trip about 40mph. Egr is working, will stall the engine at idle with a vacuum pump and the valve hold vacuum as well. Scanner shows egr on at cruise as well as guage shows vacuum to...
April 16, 2005
1999 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP52K8X
P0401: Insufficient EGR Flow Detected. ... advance!! This car came in orignally for a P0300 Code. The fuel filter was about 98% stopped up. We replaced the fuel filter and also did a throttle body cleaning..( This no longer seems to be a problem) While cleaning the throttle we discovered that the ...
April 20, 2005